Cold Applied Liquid Waterproofing
Dura-Coat
Dura-Coat is our PMMA liquid waterproofing system, a polyurethane modified methyl methacrylate resin delivering rapid cure times and seamless waterproofing for complex roof details. Fast-curing and applicable in temperatures down to 0°C, suitable for multiple substrates including concrete, asphalt, metal, bitumen membranes, new warm roofs and existing liquid systems.
Long service life
30+ years, BBA-assessed · BBA 24/7148.
Watertightness
Effective barrier to liquid water and water vapour for the life of the roof (BBA).
Fire performance
BROOF(t4) · CEN/TS 1187 Test 4 · EN 13501-5.
Tensile & flexibility
System tensile 565 N/50mm (495 N/50mm at 0°C) · BS EN ISO 527-1 · elongation 180% at +23°C.
Why specify Dura-Coat?
Rapid cure
Rapid polymerisation enables application and curing in as little as 40 minutes (temperature dependent), helping accommodate programme-sensitive works.
Low temperature application
Can be applied in temperatures down to 0°C, extending the installation season where project conditions require.
Seamless detailing
Forms a continuous waterproofing membrane around penetrations, upstands, outlets and other intricate roof details without introducing joints.
Substrate compatibility
Suitable for application to a range of compatible substrates, including concrete, asphalt, metal, timber, and existing liquid waterproofing systems.
Dura-Coat PMMA Liquid Waterproofing System Build-Up
Each Dura-Coat system comprises a sequence of compatible components, with each layer performing a specific function to prepare the substrate, form the waterproofing membrane, and protect the completed system.
Dura-Systems Primer
Preparing the substrate
Dura-Systems primers are selected to suit the existing substrate, promoting adhesion and creating a suitable surface for the liquid waterproofing system. The appropriate primer is determined by the roof construction and project requirements.
Dura-Systems Membrane Detail
Membrane Detail is a polyurethane modified, thixotropic methacrylate resin system that is suitable for creating watertight membranes on a wide variety of substrates. The formulation Dura-Systems Membrane Detail is designed for complex detailing where using Grip Soft Polyester reinforcement would not be suitable. The resin is reinforced due to the formulation containing embedded fibreglass stands and has an increased viscosity to help application on vertical, rising or very steeply inclined surfaces.
Dura-Systems Membrane Thix
For Creating Watertight Membranes
Dura-Systems Membrane Thix is a polyurethane modified, thixotropic methacrylate resin system that is suitable for creating watertight membranes on a wide variety of substrates. The formulation Dura-Systems Membrane Thix is specifically designed to be mixed with Dura-Systems Membrane to increase the viscosity of the coating to be used for coating on vertical, rising or very steeply inclined surfaces.
Dura-Systems Membrane
Dura-Systems Membrane is a polyurethane modified, thixotropic methacrylate resin system that is suitable for creating watertight membranes on a wide variety of substrates. The formulation Dura-Systems Membrane can also be used for coating on rising or very steeply inclined surfaces.
Grip Polyester Soft
Reinforcement
Grip Polyester is a strong, elastic, polyester reinforcing fabric. Each is a lightweight material ideal for use with cold-applied mastics. Grip Polyester Soft differs from Grip Polyester Firm by conforming more easily and readily to irregular shapes and surfaces, making it ideal for use over irregular surfaces.
Dura-Systems Top Coat
Protecting the system
Dura-Systems Top Coat is a reactive solvent-free, low-viscosity, virtually non-yellowing 2-component methacrylic resin offering resistance to water interaction. It serves primarily as a slightly elasticised and unpigmented Top Coat on sprinkled coatings in wet areas.
Quick Reference
| Quick Reference | Details |
|---|---|
| System Type | Cold applied liquid waterproofing |
| Base Chemistry | Polyurethane modified methyl-methacrylate resin |
| Cure Time | 40 - 80 minutes |
| Application Temperature | 0°C - 30°C |
| Application Method | Roller applied |
| Suitable Substrates | Concrete, asphalt, metal, existing liquid systems, bituminous membrane and new warm roof. |
| Reinforcement | Dura-systems Grip Polyester Soft fleece |
| Standard Colors | Light grey, dark grey, custom colours available |
| Top Coat Options | Unpigmented, RAL 7001, RAL 7015, coloured flake/quartz finishes |
| Surface Finish | Smooth elastic coating |
| Suitable For | Warm, cold, and inverted roof constructions |
| Certification | BBA Agrément certified |
| Guarantee Period | Up to 20 years |
Your next project starts here
Every project is supported by a dedicated Technical Manager, providing technical guidance from initial assessment through to specification and installation.
Proven results
across every sector.
See how we’ve helped organisations maximise building performance, delivering reliable protection and long-term value.
